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下表是某地一家超市在2017年一月份某一周内周2到周6的时间eqIdc12aac8c2448479687a40735b3572a23与每天获得的利润eqId072d7d6b911b42bc89207e72515ebf5f(单位:万元)的有关数据.
星期eqIdc12aac8c2448479687a40735b3572a23
星期2
星期3
星期4
星期5
星期6
利润eqId072d7d6b911b42bc89207e72515ebf5f
2
3
5
6
9
 
(1)根据上表提供的数据,用最小二乘法求线性回归直线方程eqIdaa7f9aaf6bca4166b27f7fc39bceb3be
(2)估计星期日获得的利润为多少万元.
参考公式:回归直线方程是:eqId644e25e1b4654dac8dc298ac44a4dcaf,eqIdf77e25b45c33437bb6729cf9defc9401
更新:2019/6/11难度系数:0.85题型:解答题组卷:215次
已知抛物线eqIdd3d25c8f95b14dfc8af75d55f7217b0b的焦点为eqIdd5b10b2a13f148b78e0d5a1b820538fd,其准线与eqIdc12aac8c2448479687a40735b3572a23轴交于点eqIdcc614bd3390c4d028df189b234dcc351,过eqIdcc614bd3390c4d028df189b234dcc351作直线eqId417e80f1349244878d01fe90e0891f5f与抛物线交于eqId2381423d4cd146cab95f55527681a766eqId8eea7f6267fb49d9bce12b8ba079a43e两点,则eqId282ee5de4c7f4499924d5fb5d534e4f6的取值范围为______________.
更新:2019/6/11难度系数:0.65题型:填空题组卷:105次
已知xy满足约束条件eqIded03ad11ad6a4d06bf30dd4d52c2b3e6,则eqId695b39432c234897a6819be1ebbeda7e的取值范围为______________.
更新:2019/6/11难度系数:0.85题型:填空题组卷:79次
曲线eqIdb9e0abe2295849db9f748a6bb7fcd391在点eqId288330fd9d5d4264bf3af965c6a75478处的切线与直线eqIdce56095acfcd4dfda1ec54da0ac277bd垂直,则eqId94761669180d40cdb23156ff15a635ee________.
更新:2019/6/11难度系数:0.85题型:填空题组卷:302次
eqId170f7a9e36404372bd1b53fdddb42bb6eqId1f49f92bcf4547438c65292d65854bef互为共轭复数,则eqId37c713e504c747acad817c325e02d21d______________.
更新:2019/6/11难度系数:0.94题型:填空题组卷:132次
已知eqId992fe44057cf4492895193f3f5398449eqIddc83d4d478e640cab6df71ab2a14ae7eeqId5f9c96c0eec34b4a9cc0f1c9cf6ff7fdeqId8eea7f6267fb49d9bce12b8ba079a43e是边eqIde84e0278d905475dbdfd36c2a4101592上的点,且eqId0725ab95a5eb4448981602dd09e362bbeqIdaad7b72a25924d078d2360cdc99f1090eqId992fe44057cf4492895193f3f5398449的外心,eqId2264f2e9311b42dc9f28d9d322a24413的值为(   )
A.8B.10C.18D.9
更新:2019/6/11难度系数:0.65题型:单选题组卷:230次
在三棱锥eqId4f24d34f3f3642608b4fb87511765d6b中,平面eqId1686246f15404e0d892538aa1e3c60f5平面eqId9e37c9c7db6b49c183010c0394cc18e4eqId9668c593319f4c908c13e5d6fbf991f8是边长为2的正三角形,若eqIdb78f7ad40835485eab260a38480efb04,三棱锥的各个顶点均在球eqIdaad7b72a25924d078d2360cdc99f1090上,则球eqIdaad7b72a25924d078d2360cdc99f1090的表面积为(   )
A.eqIdb9b9a8f4d4324da698efacc58b937db4B.eqId46739666e42445068d36464fe0cd7533C.eqId7f7ec8022b4e4967afce259ea49f903fD.eqIdcec062e8553849e4870aa69f974c376f
更新:2019/6/11难度系数:0.65题型:单选题组卷:182次
eqId9668c593319f4c908c13e5d6fbf991f8中,角eqIdcc614bd3390c4d028df189b234dcc351eqId8754ce8cf7f34f04abb9a0c041f57f5ceqId19a4eb16029e4550a14f2afe4741a3c3的对边分别为eqId70a27b6ddf6b478285353abb3b1f3741eqIde3ff50261b3b48789d45dd3876c7571beqIde35f447365484e7f891dc56884132698,若eqId5a028356481547fd976fde6cc88586dd,且eqId5b02ba8ea0f841b8a824b6ec1c30a47c ,eqIde507182388a04d908338cf946bf9ff81,则eqId9668c593319f4c908c13e5d6fbf991f8的面积为(   )
A.eqId10998f2be2d845259edc63280f567f1bB.eqId4f92ee88ff2f45b69f40d29e22c9da36C.eqId10998f2be2d845259edc63280f567f1beqId148d7b39e6f9479593f4190980730c56D.eqId9fcfca0a24044b9c8d5edff62c9dddb4eqId5405f661d89945ceb16fea3690719ec2
更新:2019/6/11难度系数:0.65题型:单选题组卷:418次
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